Getting Started with Siemens Simcenter™ STAR-CCM+™ in the Nimbix Cloud

In this article, we will show you how to get started using Siemens Simcenter STAR-CCM+ in the Nimbix Cloud. Siemens and Nimbix have deployed Simcenter STAR-CCM+ on JARVICE, the platform for the Nimbix Cloud, offering the highest performance, most cost-effective cloud solution. Nimbix provides unique advantages such as a true high performance computing (HPC) environment (instead of virtualization), fast start-up times and per-minute billing granularity.  We have set up the Simcenter STAR-CCM+ application environment for you.

Create Account

The first step to using the Nimbix Cloud is to create an account. Navigate with a browser to JARVICE Platform Sign-up. Fill in your details and payment information then click Submit.

Nimbix Cloud Signup

 

You may then login to the JARVICE Material Compute portal to get started.

Portable on Demand (POD) Licensing

Simcenter STAR-CCM+ on the Nimbix Cloud requires a POD key from Siemens.  This key should be available in your Siemens Steve Portal account.  If you don’t have a POD key or don’t know what this means, please contact your Siemens representative before proceeding with running Simcenter STAR-CCM+ on the Nimbix Cloud.

Transferring Data

The Nimbix secure data store is a service called Vaults.  This is where your Nimbix Cloud applications primarily read and write data to.  You can either move files in and out from your Vault directly (via SFTP with a tool such as Filezilla) or via HTTPS with the JARVICE File Manager application.

SFTP provides better performance and is especially helpful when moving large files.  You can log in with your JARVICE username and your JARVICE account API key as the password.  The SFTP server address is drop.jarvice.com. You can find your API key in the Profile tab of the Account section in the Material Compute portal after you log in.  

Here are more helpful articles to help with transferring data: Data Transfer  How-to’s

Running Interactive Simcenter STAR-CCM+

You can run Simcenter STAR-CCM+ in a 3D graphical environment just like you would from your own desktop.  This simplifies the workflow and lets you get started quickly. You can either start with an existing Simulation Database or create a new one.  This works from any device or network, and the 3D environment renders directly in your web browser.

To get started, click the Compute tab in the Material Compute portal and select Simcenter STAR-CCM+ 13. The applications are listed alphabetically so you will need to scroll down to find Simcenter STAR-CCM+ 13.  Once you click on Simcenter STAR-CCM+ 13, click the Simcenter STAR-CCM+ button to start the workflow.

simcenter star-ccm+

You will be presented with options as in the below screenshots.

get started star-ccm+

Select the Machine type and number of cores for the simulation. You can run your simulation in parallel across many nodes to improve performance. In the example, a 20 core Machine type is chosen, the slider will add nodes, in steps of 20 cores each for a total of 80 cores. Please note that the hourly cost of the job is multiplied by the number of nodes you select as well, as is the “compute time” that is updated in the dashboard.

You must also enter (or paste) your POD license key, exactly as it appears in your Steve Portal.  Please note that this is case sensitive, so it is recommended that you copy and paste it, rather than type it in.  You should also make sure there are no leading or trailing spaces, as this will cause the license verification to fail.  Please note that if you do not enter a POD license key here, you will not be able to use Simcenter STAR-CCM+!

If you want to open an existing Simulation Database (which must be a file with extension *.sim), select the “Optional” tab and click the gray “…” icon on the right of the “Simulation database” entry field.  You can find it in your Vault files from there with the file browser.

simulate in browser

If you want to start a new Simulation Database, simply leave the “Simulation Database” entry blank.

Once you Submit your workflow, you will see a Starting message.  You will then be directed to your Dashboard.

simulation workflow

You will see your job status.  Possible Statuses are: Submitted, Processing, Completed, Completed with Error.  If you see Completed with Error immediately, it means your POD license key is invalid.  Please try again and ensure that you paste the exact license key, case sensitive, with no leading or trailing spaces.

Click on the application preview window of the job to connect and view the desktop in a web browser. Alternatively, you may use a VNC Client to connect.  Click on the circled “i” button to find connection details.

vnc client

Terminating Interactive Job

You can terminate your sessions from the Material Compute portal using the red power button:

terminate session

Your job will also terminate if you exit the application from within the environment.  Your job will not terminate if you close the window or disconnect from your VNC client – you can reconnect and continue your simulation work at a later time.  Be sure when your simulation is completed that you have all data written to your /data in the environment before terminating. Finally, be sure not to leave sessions running unnecessarily as this will bill costs to your account. You may use the “Wall Time Limit” on the Options tab of the job submission page to prevent unbounded runs.

Support

If you have any questions please contact sales at sales@nimbix.net or for technical assistance, email support@nimbix.net.  Our team will assist with your workflows to better serve your simulation needs.